There is no C+. C and C++ are different. There are no 'commands'. All languages mentioned, including Pascal, can be used to create both graphical and command-line applications using the appropriate libraries.

There is no C+. C and C++ are different. There are no 'commands'. All languages mentioned, including Pascal, can be used to create both graphical and command-line applications using the appropriate libraries.

So you're telling me one can create graphical images with pascal using a different library. For example crt? How many libraries are there anyway? And if there are a lot, what are the best to use and most popular?

C is slimmer. This makes it more wide-spread (as in available on more platforms) and you don't have to wrestle with stupid compiler errors (anyone else often getting errors in g++ with template-stuff that wouldn't fit on a A4 Page? <3 clang) as C++ has more formal correctness rules.
It's also simply a different philosophy one could say.

C++ introduces more high-level concepts, such as OOP and template meta-programming build right into the language and adds stuff like operator-overloading. The language is based on C, but do not think it's a superset or an upgrade or something. It's just another language, which happens to also compile most C code.

Any program you can write in C, can also be written in C++ and vice versa. Mostly it will just be preference which one is chosen.
This is also the case with Pascal. You could write any program in Pascal that is possible to code in C or C++. Though I think Pascal is less popular in todays world.

Still works for teaching programming.
Delphi was one of my first languages. I think the second language that I wrote programs with more complexity of a hello world-like program.

A friend of mine started with Delphi (Object Pascal) in school and though he's no programming whiz (didn't really intend to become one) he understood all stuff when I talked about my programs with a bit simplified terms.
Unlike in my class, where we learned Java and 2 of 7 understood what really is going on, though that was the fault of the teacher.